Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between HIMAWARI-9 and NOAA-21 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 9/19/2025
Index Date Time (HIMAWARI-9) HIMAWARI-9 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/20/2025 16:16:27 -0.04, 140.78 0.70, 137.60 364.05 80
2 09/21/2025 15:55:02 -0.04, 140.78 -0.36, 142.12 153.53 80
3 09/23/2025 04:16:57 0.04, 140.71 -0.85, 136.83 442.67 80
4 09/24/2025 04:00:52 0.04, 140.69 0.21, 141.35 75.69 80
5 09/26/2025 16:03:53 -0.04, 140.71 0.01, 140.63 10.26 80
6 09/29/2025 04:04:23 0.04, 140.62 -0.15, 139.86 87.40 80
7 09/30/2025 03:48:19 0.04, 140.61 0.91, 144.39 431.43 80
8 10/01/2025 16:10:05 -0.05, 140.63 0.30, 139.13 170.92 80
9 10/02/2025 15:48:39 -0.05, 140.61 -0.71, 143.66 347.86 80

Figure of HIMAWARI-9 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/19/2025
SNOs_Map_HIMAWARI-9_NOAA-21_20250920.jpg

Download SNOs between HIMAWARI-9 and NOAA-21 since TLE EPOCH: 09/19/2025 in txt file.

Historical Predications of SNOs between HIMAWARI-9 and NOAA-21